[jira] [Resolved] (OLINGO-847) How to implement ExpressionVisitor for secondary entities in OData 2.0 ?

["Christian Amend (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/OLINGO-847?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Christian Amend resolved OLINGO-847.
------------------------------------
    Resolution: Fixed
      Assignee: Christian Amend

Hi Joshi,

here the answer I wrote on the mailing list for reference:

within the visitMember method you will have access to the kind of property which was addressed. For example our testing scenario throws a “not implemented” in this case as shown in this code:

  CommonExpression currentExpression = memberExpression;
      while (currentExpression != null) {
        final PropertyExpression currentPropertyExpression =
            (PropertyExpression) (currentExpression.getKind() == ExpressionKind.MEMBER ?
                ((MemberExpression) currentExpression).getProperty() : currentExpression);
        final EdmTyped currentProperty = currentPropertyExpression.getEdmProperty();
        final EdmTypeKind kind = currentProperty.getType().getKind();
        if (kind == EdmTypeKind.SIMPLE || kind == EdmTypeKind.COMPLEX) {
          propertyPath.add(0, (EdmProperty) currentProperty);
        } else {
          throw new ODataNotImplementedException();
        }
        currentExpression =
            currentExpression.getKind() == ExpressionKind.MEMBER ? ((MemberExpression) currentExpression).getPath()
                : null;
      }

Instead in your code you would need to follow the path which leads you to the addressed navigation property.

Best Regards,
Christian


> How to implement ExpressionVisitor for secondary entities in OData 2.0 ?
> ------------------------------------------------------------------------
>
>                 Key: OLINGO-847
>                 URL: https://issues.apache.org/jira/browse/OLINGO-847
>             Project: Olingo
>          Issue Type: Question
>            Reporter: Prathamesh Joshi
>            Assignee: Christian Amend
>            Priority: Critical
>              Labels: Odata, Olingo
>
> Hi all,
> I have Odata service implemented which takes URL request and then fetches corresponding data from service layer. I have implemented ExpressionVisitor for extracting filter criteria from Odata URL. It works fine for simple entities but when I apply filter to  a field of nested  entity ExpressionVisitor doesnt identifies it. Is there any way to identify nested entities filter operation ?
>  



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)